@Jason Steeves , For your request, based on my research, I find a PowerShell script to export overrides for the reference:
https://www.vroege.biz/?p=675
Note: non-Microsoft link, just for the reference.
Meanwhile, for the migration, here are some links for the reference:
https://kevinholman.com/2019/03/07/scom-2019-news/
https://kevinholman.com/2020/05/25/upgrade-from-scom-2012r2-to-scom-2016-checklist/
Note: non-Microsoft link, just for the reference.
Hope it can help.
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